Global Patent Index - EP 2371476 A1

EP 2371476 A1 20111005 - Method for welding workpieces made from extremely heat-proof superalloys

Title (en)

Method for welding workpieces made from extremely heat-proof superalloys

Title (de)

Verfahren zum Schweißen von Werkstücken aus hochwarmfesten Superlegierungen

Title (fr)

Procédé de soudure de pièces usinées à partir de superalliages résistant à une chaleur élevée

Publication

EP 2371476 A1 20111005 (DE)

Application

EP 11004777 A 20100916

Priority

  • EP 10177015 A 20100916
  • DE 102009049518 A 20091015

Abstract (en)

The method for welding workpieces (9) from heat-resistant super alloy, comprises introducing a welding filler material (13) onto a workpiece surface (10) using a heat entry zone (11) and a supply zone for supplying the welding filler material into the heat entry zone, where the heat entry zone and the supply zone at one side and the workpiece surface on the other side are moved relative to each other, and selecting welding parameters such as welding capacity, process speed and diameter of a welding beam, so that the cooling rate is 8000 Kelvin per seconds (K/s). The method for welding workpieces (9) from heat-resistant super alloy, comprises introducing a welding filler material (13) onto a workpiece surface (10) using a heat entry zone (11) and a supply zone for supplying the welding filler material into the heat entry zone, where the heat entry zone and the supply zone at one side and the workpiece surface on the other side are moved relative to each other, and selecting welding parameters such as welding capacity, process speed and diameter of a welding beam, so that the cooling rate is 8000 Kelvin per seconds (K/s) during the solidification of the material in which a polycrystalline welding seam (19, 21) is obtained. The welding parameters are adjusted in relation to the welding capacity and the diameter of the heat entry zone, so that the cooling rate is 8000 Kelvin per seconds (K/s) during the solidification of the material. The process speed is 500 mm/minutes. The welding seam is produced by introducing the welding filler material where the previous layer is melted and the previously applied layer is again melted in less than the half of its laser strength. For each layer, the heat entry zone and the supply zone are moved relative to the workpiece surface along a welding direction. The welding directions of the subsequent layers are rotated against each other. The heat entry zone and the supply zone are moved along the welding direction relative to the workpiece at a path oscillating around the welding direction. The workpiece contains gamma -containing nickel basis super alloy. The welding filler material is gamma -forming nickel basis super alloy material. A heat treatment follows to the introduction of the welding filler material. A 300W-laser is used in the process. Neodymium-yttrium aluminum garnet laser is used in the process, where lambda is 1.06 mu m. The laser capacity is 100-150 W. The diameter of the laser beam is 600 mu m.

Abstract (de)

Es wird eine Schweißverfahren zum Schweißen von Werkstücken (9) aus hochwarmfesten Superlegierungen zur Verfügung gestellt. Diese umfasst: - Erzeugen einer Wärmeeintragszone (11) mit einer Wärmequelle (3) auf der Werkstückoberfläche (10); - Zuführen von Schweißzusatzwerkstoff (13) mit einer Zuführeinrichtung (5) in die Wärmeeintragszone und - Erzeugen einer Relativbewegung mit einer Transporteinrichtung (15) zwischen der Wärmequelle (3) und Zufuhreinrichtung (5) einerseits sowie der Werkstückoberfläche (10) andererseits. Das Schweißverfahren umfasst weiterhin einen Steuereinheitschritt, welcher die Relativbewegung so durchführt, dass die Schweißleistung sowie der Durchmesser der Wärmeeintragszone (11) so eingestellt sind, dass die Abkühlrate bei der Erstarrung des Materials mindestens 8000 Kelvin pro Sekunde beträgt, so dass eine polykristalline Schweißnaht erzielt wird.

IPC 8 full level

B23K 26/14 (2006.01); B23K 26/32 (2006.01); B23K 26/34 (2006.01); B23P 6/00 (2006.01); F01D 5/00 (2006.01)

CPC (source: EP US)

B23K 26/144 (2015.10 - EP US); B23K 26/32 (2013.01 - EP US); B23K 26/342 (2015.10 - EP US); B23K 35/007 (2013.01 - EP US); B23K 35/3033 (2013.01 - EP US); B23K 2101/001 (2018.07 - EP US); B23K 2103/08 (2018.07 - EP US); B23K 2103/26 (2018.07 - EP US); B23K 2103/50 (2018.07 - EP US); F05B 2230/232 (2013.01 - EP US); F05B 2230/80 (2013.01 - EP US)

Citation (applicant)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

Designated extension state (EPC)

BA ME RS

DOCDB simple family (publication)

EP 2311597 A1 20110420; EP 2311597 B1 20140402; CN 102039494 A 20110504; CN 102039494 B 20150218; DE 102009049518 A1 20110421; EP 2371476 A1 20111005; EP 2371476 B1 20140507; JP 2011083822 A 20110428; JP 5797887 B2 20151021; US 2011089150 A1 20110421; US 8426765 B2 20130423

DOCDB simple family (application)

EP 10177015 A 20100916; CN 201010510921 A 20101015; DE 102009049518 A 20091015; EP 11004777 A 20100916; JP 2010232369 A 20101015; US 90421610 A 20101014